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C. F. STREET & N. M. LOWER. MECHANICAL STOKER. APPLICATION FILED on. 2; 19H.

Patented Aug. 22, 1916.

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CLEMENT F. STREET AND NATHAN M. LOWER, OF SCHEN ECTADY, NEW YORK, ASSIGN- ORS TO THE LOCOMOTIVE STOKER COMPANY, OF WILMERDING, PENNSYLVANIA, A

CORPORATION OF PENNSYLVANIA.

MECHANICAL STOKER.

Specification of Letters Patent. Patented Aug. 22, 1916,

Application filed October 2, 1911. Serial No. 652,462.

To all whom it may concern:

Be it known that we, CLEMENTF. STREET and NATHAN M. Lownn, both citizens of the United States, residing at Schenectady, in the county of Schenectady and State of New York, have invented certain new and useful Improvements in Mechanical Stokers, of which the following is a specification.

This invention relates to mechanical stokers of the so-called scatter type, in which lump fuel is distributed over the grate of the fire box-by means of jets or blasts of fluid pressure through suitable distributer nozzles directed over different portions of the grate area, as described in the prior application of C. F. Street Serial No. 565,579, filed June 7, 1910.

The object of the present invention is to provide improved means for regulating the amount and character of fuel delivered to the several distributers in order that the fire may be properly controlled and all of the fuel be efficiently consumed.

In the accompanying drawing, Figure 1 is a front elevation of a boiler furnace with our improved system of fuel discharge pipes and regulating devices for delivering the fuel to the distributor nozzles, portions of the discharge and conveyer pipes being broken away; Fig. 2, a transverse section of the discharge pipe and screen taken on the line w a: of Fig. 1; Fig. 3, a similar transverse section taken on the line '5 3 of Fig. 1; Fig. 4:, a longitudinal section of the separating screen; and Fig. 5, a transverse section thereof.

As shown and described in the prior application above referred to, the apparatus is applied to the boiler furnace of a locomotive and comprises, generally, a fuel elevator in the form of a continuous conveyer, 13, operating in tubes, 12, for discharging fuel into a hopper over the furnace door, 6,

from which hopper, fuel conduits lead to the side portions of the same, and our present invention is designed to regulate the distribution of the fuel in this manner.

According to the particular form of apparatus shown in the present drawing, the hopper of the prior device is dispensed with and the delivery pipes or conduits, 19 and 19*, leading to the respective side distributers, 19 and 19 and the delivery conduit,

justable assorting riddle or screen, 51, is

provided at the opening from the supply pipe or casing, 18, to said pipe, 20, so that the small pieces or fine part of the fuel may be delivered to the intermediate distributer, while the larger lumps are carried along over the screen to the discharge opening leading to the conduits of the side distributers. The screen, 51, is preferably in the form of a hollow perforated cylinder rotatably mounted in the pipe, 18, and provided upon its circumference with a plurality of sets of perforations of different sizes, as shown more fully in Figs. 4 and 5. For the purpose of rotating the screen and thereby adjust the same so that the several sets of perforations may be brought into position for use, a pivoted lever, 53, maybe provided having a spring ratchet arm, 53, engaging notches in the cylindrical screen, 51, as shown more clearly in Fig. 2. By this means the screen may be rotated to any position in. which the desired set ofperforations is located at the bottom of the cylinder over the inlet opening to the intermediate conduit, 20 and beneath the buckets of the conof fuel delivered to the center distributer,

, *tion of a plurality of separate distributers the screen may be rotated until a division having larger perforations is brought into position for use, thereby affording a means for obtaining a fine graduation of the amount of fine fuel delivered to the intermediate or center distributer.

As the conveyor carries the larger pieces other by means of a handle, 50, extending out through the casing, and havmg means for securing the same in any desired position, as shown more fully in Fig. 3. The deflector may usually be vertical to e substantially equal quantities of fue to each of the side distributers, but if at any time, it is desired to divert a larger amount to one side than to'the other, the deflector may be readily adjusted in the desired position.

As, the pipe section, 18, of the elevator casing extends in a direction transverse to the furnace and to the railway track, and the deflector is similarly alined, the tendency of the lateral or rocking movement of the locomotive when running, to cause irregular or unequal amounts of fuel to be fed to one conduit or the other, is entirely eliminated, and the deflector, when adjusted, in any given'position, operates to divert the desired proportions of fuel to the respective conduits, regardless of the transverse swaying or lurching of-the locomotive.

The distributers may be provided with the fluid. pressure nozzle connections, 28, and the air inlets, 27, as shown and described in the prior application above re ferred to, and while we have herein illustrated our improvements in connection with two side distributers and one center distributer, it will be evident that a different number may be employed if preferred, and also that more than one intermediate distributer may be used if desired.

Having now described our invention, what we claim as new, and desire to secure by Letters Patent, is:

1. In a mechanical stoker, the combination of a fuel supply, a plurality of separate conduits leading to different portions of the furnace, means for assorting the fuel as to size, and means for feeding the smaller pieces to one conduit of the furnace and the larger pieces to another conduit.

2. In a mechanical stoker, the combinacommunicating at different points transversely of the furnace, conduits leading to the several distributers, a source of fuel supply delivering to the conduits, and means for assorting the fuel as to size as delivered to the respective conduits.

3. In a mechanical stoker, the combination of a delivery pipe, a conveyer mounted erally from the pipe and arranged longitudinally thereof, and a rotatable cylindrical screen, having a plurality of differentiated sections, housed within the pipe and covering the receiving end of the conduit first in order. i 1

5. In a mechanical stoker, the combination of a plurality of conduits for delivering fuel to different portions of the furnace; a conveyer casing for supplying fuel to said conduits successively, and a perforated screen located over the receiving end of the first conduit for assorting the fuel as to size as delivered to the successive conduits, the other conduits not having similar screens.

6. In a mechanical stoker, the combination with a plurality of distributers for distributing the fuel over different portions of the grate area, of separate conduits for delivering fuel to said distributers, a conveyer casing for supplying fuel to said conduits successively, and an adjustable perforated screen located over the receiving end of the first conduit only, whereby the fuel de-.

livered to said conduits is assorted as to s1ze.

7. In a mechanical stoker, the combination with a plurality. of side distributers and an intermediate distributer for distributing the fuel over different portions of the grate area, of separate conduits for delivering fuel to said distributers, a conveyer casing for supplying fuel to said conduits, the conduit for the intermediate distributer being connected to said' casing in advance of tributing fuel over different portions of the.

grate area, and separate conduits for delivering fuel to said distributers, of a supply pipe or casing communicating with the respective delivery conduits successively,

and a cylindrical screen having perfora-' grate area, of separate conduits for delivering fuel to said distributers, a discharge pipe or conduit communicating with the respective delivery conduits, a perforated screen for regulating the supply of fuel from the discharge pipe to the delivery conduit of the intermediate distributer, and an adjustable deflector for varying the amount of fuel. delivered from the discharge pipe to the respective side distributers.

10. Ina mechanical stoker, the combination with a plurality of side distributers and an intermediate distributer for distributing the fuel over different portions of the grate area, of separate conduits for delivering fuel to said distributers, an adjustable perforated screen for regulating the character and amount of fuel delivered to an intermediate conduit, and an adjustable defiector for varying the amount of fuel delivered to the respective side distributers.

11. In a mechanical stoker for locomotives, the combination of a plurality of fuel distributers, a delivery pipe arranged transversely of the locomotive, conduits leading laterally from the pipe to the several distributers, and an adjustable deflector plate separating the receiving ends of a pair of theconduits and disposed parallel to the axis of the pipe.

12. In a mechanical stoker for locomotives, the combination of a plurality of conduits for delivering fuel to diflerent portions of the furnace, a supply pipe arranged transversely of the locomotive and communicating with said conduits, said con duits having their inlet openings located side by side transversely of said supply pipe, and an adjustable deflector mounted between said openings and parallel with the supply pipe for regulating the amount of fuel delivered to the respective conduits.

CLEMENT F. STREET. NATHAN M. LOWER.

Witnesses as to Mr. Streets signature:

L. E. OSBORNE,

GHAs. F. GERNERT. Witnesses as to Mr. Lowers signature:

- THORNTON JoNEs,

BEN H. STONE. 

